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Question

By which of the following plots ΔH for the reaction in equilibrium can be obtained
CaCO3(s)CaO(s)+CO2(g)?

A
logPCO2vsT
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B
logPCO2vs1/T
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C
logVCO2vsT
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D
KpvsT
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Solution

The correct option is B logPCO2vs1/T
For the reaction:
CaCO3(s)CaO(s)+CO2(g)
Kp=PCO2
lnKp=ΔHRT=lnPCO2
So by slope of logPCO2vs1/T
we can obtained value of ΔH

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